Heart FailureCardiomyopathy, DilatedCardiomyopathy, HypertrophicHeartCardiomyopathiesCardiomyopathy, RestrictiveHeart RateTakotsubo CardiomyopathyMyocardiumCardiomyopathy, Hypertrophic, FamilialCardiac Output, LowEchocardiographyVentricular Function, LeftHeart Failure, SystolicChagas CardiomyopathyVentricular Dysfunction, LeftStroke VolumeHeart DiseasesHeart TransplantationHeart Failure, DiastolicHemodynamicsMyocardial ContractionTreatment OutcomeNatriuretic Peptide, BrainVentricular RemodelingCardiomyopathy, AlcoholicMyocytes, CardiacHeart VentriclesChronic DiseaseFollow-Up StudiesElectrocardiographyAdrenergic beta-AntagonistsTime FactorsCardiac Pacing, ArtificialProspective StudiesCardiotonic AgentsMyocarditisTreatment FailureCardiomegalyMyocardial IschemiaHeart Function TestsPrognosisSeverity of Illness IndexRisk FactorsArrhythmogenic Right Ventricular DysplasiaHeart Defects, CongenitalEchocardiography, DopplerHeart SeptumDisease Models, AnimalDeath, Sudden, CardiacDiastoleSystoleDiabetic CardiomyopathiesRetrospective StudiesHeart-Assist DevicesMyocardial InfarctionPredictive Value of TestsFibrosisExercise TestPropanolaminesHeart AtriaArrhythmias, CardiacVentricular DysfunctionHypertrophy, Left VentricularDiureticsAngiotensin-Converting Enzyme InhibitorsBiological MarkersHeart BlockHospitalizationCardiac MyosinsEndomyocardial FibrosisCarbazolesExercise ToleranceFetal HeartAtrial Natriuretic FactorTachycardia, VentricularRisk AssessmentVentricular PressureDogsDefibrillators, ImplantableVentricular Outflow ObstructionCohort StudiesCardiovascular AgentsPacemaker, ArtificialDigoxinMetoprololMyosin Heavy ChainsCardiac CatheterizationDisease ProgressionSurvival AnalysisEndocardiumHeart ValvesCase-Control StudiesVentricular MyosinsSurvival RateOxygen ConsumptionSympathetic Nervous SystemTroponin TMitral Valve InsufficiencySarcomeres